So ingenious its just one of those impossible effects. Perform over and over with different food selections. Display a large black envelope with the word Prediction printed on it.Ask ANY spectator to name ANY food they like to cook on a barbacue. For example say they say Chicken

The envelope is opened and a large silk screened BARCODE is removed as you claim that this is the barcode for Chicken. After a few groans the barcode is turned around and a SEALED envelope is on the BACK!This SEALED envelope is opened

A card is removed, printed in large black bold letters is the word CHICKEN. A unique NEO-Magnetic principle thats makes predictions automatic!